ORIGINAL: Buckmeister
It's likely CA glue. It affects the sinus for a number of us.
Choices: Stop using the regular CA and start using the ''Foam safe'' CA. (It cost more but this works for many people with the probem.) (Combine this with e next step if you can.)
Next choice, really ventilate the room and use more Titebond or Elmer's wood glue. Use the Foam safe to tack-glue and the Elmer's to make the permanent glue joint.
Next choice is to stop building. Typically if it's caused by CA glue, the symptoms will get worse with time.
[8D]Another choice: Purchase a mask which will filter out the fumes. While wearing the mask, you may look like Darth Vader, but the mask works.
I use it for every aircraft building project. Check out Sears, Lowes, etc.